1. Recent Articles From Around The Web

    1. Impact of Posterior Sclera on Glaucoma Progression in Treated Myopic Normal-Tension Glaucoma Using Reconstructed Optical Coherence Tomographic Images

      Impact of Posterior Sclera on Glaucoma Progression in Treated Myopic Normal-Tension Glaucoma Using Reconstructed Optical Coherence Tomographic Images

      Purpose : To investigate factors associated with visual field (VF) progression in treated myopic normal-tension glaucoma (NTG) using a novel posterior sclera reconstruction method involving swept-source optical coherence tomography (OCT). Methods : Fifty-six myopic patients on ocular hypotensive therapy with the diagnose NTG had five or more VF tests during a period of 72.63 ± 20.46 months in clinical follow-up. Glaucomatous VF progression was decided by the standards of Early Manifest Glaucoma Trial criteria. Coronally reconstructed OCT images were used to obtain the position of the deepest point of the eye (DPE), and parameterized the distance (Disc-DPE distance), depth (Disc–DPE ...

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    2. Intravascular Ultrasound and Optical Coherence Tomography in the Procedural Planning and Execution of Left Main Coronary Artery Percutaneous Coronary Intervention

      Intravascular Ultrasound and Optical Coherence Tomography in the Procedural Planning and Execution of Left Main Coronary Artery Percutaneous Coronary Intervention

      Purpose of Review Left main coronary artery disease (LMCAD) is a frequently encountered, high-risk presentation of atherosclerosis, traditionally managed with surgical bypass grafting. Percutaneous coronary intervention (PCI) for LMCAD is an increasingly attractive option for patients with low to intermediate complexity disease or patients at extremely high or prohibitive surgical risk. The goal of this review is to outline the current indications and guideline recommendations regarding PCI for LMCAD and the role of intracoronary imaging in optimizing these cases. Recent Findings Several recent randomized controlled trials have demonstrated the non-inferiority of PCI in LMCAD compared with CABG. Further, the use ...

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    3. Changes in Retinal Vasculature and Thickness after Small Incision Lenticule Extraction with Optical Coherence Tomography Angiography

      Changes in Retinal Vasculature and Thickness after Small Incision Lenticule Extraction with Optical Coherence Tomography Angiography

      Purpose . To evaluate the changes in retinal vessel density and thickness after small incision lenticule extraction (SMILE) with optical coherence tomography angiography (OCTA) in myopic patients. Methods . In this prospective study, SMILE surgeries were done in 46 eyes of 24 patients with spherical equivalent (SE) more than −6.0 diopters ( D ). Retinal vessel density and thickness at the macula and optic nerve were recorded with OCTA before and 1 day, 2 weeks, and 1 month after surgery. Intraocular pressure (IOP), uncorrected distance visual acuity (UDVA), and refraction were taken at the same time. Results . The superficial retinal vessel density and ...

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    4. Mapping diurnal variations in choroidal sublayer perfusion in patients with idiopathic epiretinal membrane: an optical coherence tomography angiography study

      Mapping diurnal variations in choroidal sublayer perfusion in patients with idiopathic epiretinal membrane: an optical coherence tomography angiography study

      Background Optical coherence tomography angiography (OCTA) is a non-invasive tool for imaging and quantifying the choroidal vasculature and perfusion state. In this index study, OCTA was used to investigate diurnal changes in choroidal sublayer perfusion in eyes with idiopathic epiretinal membrane (ERM) and to identify impacting factors. Methods A prospective study was conducted on volunteers with symptomatic ERM, each of whom underwent repeated measurements of subfoveal choroidal thickness (SFCT) using enhanced-depth imaging optical coherence tomography and perfusion of choroidal vascular sublayers using OCTA at 7 a.m., 12 p.m., 4 p.m., and 8 p.m. Possible interactions between ...

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    5. Automatic detection of retinal regions using fully convolutional networks for diagnosis of abnormal maculae in optical coherence tomography images

      Automatic detection of retinal regions using fully convolutional networks for diagnosis of abnormal maculae in optical coherence tomography images

      In conventional retinal region detection methods for optical coherence tomography (OCT) images, many parameters need to be set manually, which is often detrimental to their generalizability. We present a scheme to detect retinal regions based on fully convolutional networks (FCN) for automatic diagnosis of abnormal maculae in OCT images. The FCN model is trained on 900 labeled age-related macular degeneration (AMD), diabetic macular edema (DME) and normal (NOR) OCT images. Its segmentation accuracy is validated and its effectiveness in recognizing abnormal maculae in OCT images is tested and compared with traditional methods, by using the spatial pyramid matching based on ...

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    6. Ocular albinism with mutation in GPR143: Findings in wide-field autofluorescence and optical coherence tomography

      Ocular albinism with mutation in GPR143: Findings in wide-field autofluorescence and optical coherence tomography

      A 12 year-old boy who consulted due to nystagmus and low vision from birth. His mother also consulted for low vision of the right eye since she was a child, which worsened recently. The physical examination revealed no alterations in skin and hair pigmentation. In the examination of the anterior segment of the child, areas of slight circumferential hypopigmentation were observed in the iris in both eyes. The fundus examination revealed a choroidal fundus due to the absence of melanin in the retinal pigment epithelium. In the autofluorescence, an absence of physiological macular hypo-autofluorescence was observed and, in optical coherence ...

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    7. Classification and treatment follow-up of a juxtapapillary retinal hemangioblastoma with optical coherence tomography angiography

      Classification and treatment follow-up of a juxtapapillary retinal hemangioblastoma with optical coherence tomography angiography

      Purpose Only an endophytic growth pattern in juxtapapillary retinal hemangioblastoma (JRH) is an indication for surgical treatment, but classification of growth types is difficult using conventional imaging techniques. This case report describes the use of optical coherence tomography angiography (OCT-A) features for classification and treatment follow-up in a case with JRH. Observations The JRH of this patient was easily detected with two different OCT-A methods in both en-face and cross-sectional B-scan images, and was classified as a sessile growth type. This growth type excluded the treatment option of vitreoretinal surgery with excision of the lesion or ligation of the feeder ...

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    8. Optical coherence tomography imaging of cardiac substrates

      Optical coherence tomography imaging of cardiac substrates

      Cardiovascular disease is the leading cause of morbidity and mortality in the United States. Knowledge of a patient’s heart structure will help to plan procedures, potentially identifying arrhythmia substrates, critical structures to avoid, detect transplant rejection, and reduce ambiguity when interpreting electrograms and functional measurements. Similarly, basic research of numerous cardiac diseases would greatly benefit from structural imaging at cellular scale. For both applications imaging on the scale of a myocyte is needed, which is approximately 100 µm × 10 µm. The use of optical coherence tomography (OCT) as a tool for characterizing cardiac tissue structure and function has been ...

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    9. Optical Coherence Tomography and Optic Neuritis Not Related to Multiple Sclerosis

      Optical Coherence Tomography and Optic Neuritis Not Related to Multiple Sclerosis

      The visual prognosis of optic neuritis not related to multiple sclerosis is unknown, both in terms of functional recovery and evolution. This prospective cohort study aim to assess the ophthalmological evolution of patients presenting an episode of optic neuritis (NO) not related to a multiple sclerosis or to a clinically isolated syndrome.

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    10. Macular Microvascular Networks In Healthy Pediatric Subjects

      Macular Microvascular Networks In Healthy Pediatric Subjects

      Purpose: To report optical coherence tomography angiography ( OCTA ) values in healthy pediatric eyes and to identify factors that may modify these values. Methods: In this prospective observational cross-sectional study, macular OCTA images were acquired from healthy pediatric patients. Main outcome measures were 1) foveal avascular zone (FAZ) area at the level of the superficial retinal capillary plexus (SCP); 2) SCP and deep retinal capillary plexus (DCP) perfusion density (based on the area of vessels); 3) SCP and DCP vessel density (based on a map with vessels of 1-pixel width); and 4) CC perfusion density. Multiple regression analysis was performed to ...

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    11. Vascular Alterations Revealed With Optical Coherence Tomography Angiography In Patients With Choroideremia

      Vascular Alterations Revealed With Optical Coherence Tomography Angiography In Patients With Choroideremia

      Purpose: Choroideremia is a rare degenerative retinal disease that causes incurable blindness. It occurs as a result of the deficiency of the X-linked CHM gene, which encodes the Rab escort protein 1 (REP1). Gene therapy has been developed to treat CHM using adeno-associated viral vectors and is currently undergoing clinical trials. Expression of the CHM gene is ubiquitous throughout the retina, and it is therefore important to identify which retinal layers are affected in the disease process. The purpose of this study was to assess in particular the choriocapillaris using optical coherence tomography angiography because this layer is difficult to ...

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    12. Chalcogenide-glass polarization-maintaining photonic crystal fiber for mid-infrared supercontinuum generation

      Chalcogenide-glass polarization-maintaining photonic crystal fiber for mid-infrared supercontinuum generation

      In this paper, we report the design and fabrication of a highly birefringent polarization-maintaining photonic crystal fiber (PM-PCF) made from chalcogenide glass, and its application to linearly-polarized supercontinuum (SC) generation in the mid-infrared region. The fiber was drawn using the casting method from As38Se62 glass which features a transmission window from 2 to 10 µm and a high nonlinear index of 1.13×10-17 m2 /W. It has a zero-dispersion wavelength around 4.5 µm and, at this wavelength, a large birefringence of 6×10-4 and consequently strong polarization maintaining properties are expected. Using this fiber, we experimentally demonstrate supercontinuum ...

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    13. Supervised machine learning based multi-task artificial intelligence classification of retinopathies

      Supervised machine learning based multi-task artificial intelligence classification of retinopathies

      Artificial intelligence (AI) classification holds promise as a novel and affordable screening tool for clinical management of ocular diseases. Rural and underserved areas, which suffer from lack of access to experienced ophthalmologists may particularly benefit from this technology. Quantitative optical coherence tomography angiography (OCTA) imaging provides excellent capability to identify subtle vascular distortions, which are useful for classifying retinovascular diseases. However, application of AI for differentiation and classification of multiple eye diseases is not yet established. In this study, we demonstrate supervised machine learning based multi-task OCTA classification. We sought 1) to differentiate normal from diseased ocular conditions, 2) to ...

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      Mentions: Xincheng Yao
    14. OCT-Detected Optic Nerve Head Neural Canal Direction, Obliqueness and Minimum Cross-Sectional Area in Healthy Eyes

      OCT-Detected Optic Nerve Head Neural Canal Direction, Obliqueness and Minimum Cross-Sectional Area in Healthy Eyes

      Purpose To assess anterior scleral canal opening (ASCO) offset relative to Bruch’s membrane opening (BMO) (ASCO/BMO offset) so as to determine neural canal direction, obliqueness, and minimum cross-sectional area (NCMCA) in 362 healthy eyes. Design Cross-sectional study Methods After OCT optic nerve head (ONH) and retinal nerve fiber layer thickness (RNFLT) imaging, BMO and ASCO were manually segmented and planes, centroids, size and shape were calculated. Neural canal direction was defined by projecting the neural canal axis vector (connecting BMO and ASCO centroids) onto the BMO plane. Neural canal obliqueness was defined by the angle between the neural ...

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  2. Organizations in the News

    1. (2 articles) UCLA
    2. (2 articles) Konyang University
    3. (2 articles) Peking University
    4. (2 articles) Chinese Academy of Sciences
    5. (2 articles) University of Coimbra
    6. (2 articles) Erasmus University
    7. (1 articles) Cardiovascular Research Foundation
    8. (1 articles) Johns Hopkins University
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  3. People in the News

    1. (2 articles) Ton G. van Leeuwen
    2. (2 articles) Giulio Guagliumi
    3. (2 articles) Takashi Akasaka
    4. (2 articles) Michael Joner
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  4. OCT Companies in the News

    1. (1 articles) Optovue
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  5. Picture Gallery

    Post-Doctoral Research Opening in the Department of Physics at University of Coimbra, Portugal The First In Vivo Needle‐Based Optical Coherence Tomography in Human Prostate: A Safety and Feasibility Study Expert consensus published on use of imaging to guide heart attack treatment Research Scientist for Optical Diagnostic at Carestream Dental Clinical use of intracoronary imaging. Part 2: acute coronary syndromes, ambiguous coronary angiography findings, and guiding interventional decision-making: an expert consensus document of the European Association of Percutaneous Cardiovascular Intervent Optimal intereye difference thresholds by optical coherence tomography in multiple sclerosis: An international study PhD Studentship Opening at The University of Liverpool Postdoctoral Positions Immediately Open at Boston University School of Medicine, Boston Medical Center Avinger Announces Successful Treatment of 1,000th Patient with Next-Generation Pantheris Device Ping An completes multi-center clinical trials for world's first intelligent OCT retinal disease screening system In vivo volumetric imaging by crosstalk-free full-field OCT EXALOS Introduces RGB Modules for Augmented Reality and Head-up Display Applications
  6. Recent Quotes

    1. Imaging is more accurate, helps guide decisions and facilitates tailored therapy, especially in younger heart attack patients who more frequently have plaque erosion or non-atherosclerotic coronary artery disease.
      By Giulio Guagliumi
    2. We are very pleased with the outcomes of this study, which are the culmination of hard work by 47 physicians across 18 collaborating hospitals...What is further encouraging is that this study was undertaken without key technological improvements that have since been launched commercially. We anticipate that future studies using the Real-time Targeting laser marking feature and our newly launched artificial intelligence software, Intelligent Real-time Image Segmentation, will improve upon these already very positive results. Working together with our commercial partner, Merit Medical, and many of the leading hospitals in the United States, we are ecstatic that this technology continues to have an important and beneficial impact for patients.
      By Eman Namati
    3. We can’t use functional OCT/OCTA in the brain to look at neurovascular coupling at the cellular level because the brain is surrounded by the skull, and fine resolution isn’t possible...But we can use functional OCT/OCTA to examine the interactions between individual photoreceptors and their blood vessels in the retina, which is much more accessible in the eye.
      By Xincheng Yao
    4. With the NSTIN plot, the temporal quadrant of the retinal nerve fiber layer is displayed in the center of the B-scan. This portion of the disc is crucial for everyday visual function, and identification of abnormal thinning in this region is essential for managing glaucoma.
      By Donald C. Hood
    5. Conavi is delighted to receive approval for the clinical use of the Novasight Hybrid System in Canada and are thankful to the many researchers, clinicians, patients, employees and other stakeholders that made this milestone possible.
      By Brian K. Courtney
    6. Being named a Fellow is a great honor, and I am in very illustrious company.
      By Audrey K. Bowden
    7. We are very excited and honored to partner with the team at Adachi. Adachi’s strong market presence in Otolaryngology, as well as their expertise in navigating Japanese regulatory and reimbursement pathways, will ensure a powerful launch of the TOMi Scope in the Japanese marketplace. We see this partnership as further validation of our technology and its potential to impact healthcare in a meaningful way. We look forward to a long and fruitful relationship with Adachi.
      By Ryan L. Shelton
    8. You can see right into the tooth,” said Dr. Daniel Fried, professor, University of California, San Francisco School of Dentistry. “The enamel looks almost like an ice cube...Many lesions in the mouth have been re-mineralized and...no longer need inter­vention,” said Fried. “Dentists have trouble telling the difference between active and arrested lesions; this new technology has the potential of differentiating them.
      By Daniel S. Fried
    9. OCT [already] has changed the practice of ophthalmol­ogy...It’s been very successful for retinal imaging...and it’s also very promising for dentistry...If the dentist doesn’t know if [a lesion] is active or arrested,” said Fried, “with OCT, you can actually see the lesion struc­ture, how deep it is and if it has a definitive surface zone suggesting that remineralization has occurred.
      By Daniel S. Fried
    10. This is the largest meeting in the world for biomedical optics, and that's because of you!
      By Rox Anderson